/* Global Reset & Variables */
:root {
  --bg-body: #050505;
  --bg-card: #0F0F0F;
  --bg-card-hover: #161616;
  --text-primary: #EDEDED;
  --text-secondary: #A1A1A1;
  --accent-color: #3B82F6;
  /* Tech blue, subdues */
  --border-color: #262626;
  --primary-font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono-font: 'JetBrains Mono', monospace;

  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 32px;
  --spacing-xl: 64px;
  --spacing-2xl: 120px;

  --container-width: 1200px;
  --header-height: 70px;
  --border-radius: 4px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-body);
  color: var(--text-primary);
  font-family: var(--primary-font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: opacity 0.2s ease;
}

ul {
  list-style: none;
}

/* Utilities */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--border-radius);
  transition: all 0.2s ease;
  cursor: pointer;
  letter-spacing: -0.01em;
}

.btn-primary {
  background-color: var(--text-primary);
  color: var(--bg-body);
  border: 1px solid var(--text-primary);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--text-primary);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--text-primary);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

.big-btn {
  padding: 16px 32px;
  font-size: 18px;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(5, 5, 5, 0.8);
  backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
}

.header-inner {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 48px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.site-nav a:not(.btn) {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.site-nav a:not(.btn):hover {
  color: var(--text-primary);
}

/* Hero */
.hero {
  padding-top: calc(var(--header-height) + var(--spacing-2xl));
  padding-bottom: var(--spacing-2xl);
  position: relative;
  overflow: hidden;
}

/* Subtle architectural grid background */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0%;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(var(--border-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.05;
  z-index: -1;
  pointer-events: none;
}

.hero-content {
  max-width: 800px;
}

.hero h1 {
  font-size: 4rem;
  /* Senior, bold */
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(to right, #fff, #888);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
}

/* Value Prop */
.value-prop {
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--border-color);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.value-card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.value-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Section Common */
section {
  padding: var(--spacing-xl) 0;
}

.section-header {
  margin-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-md);
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

/* About Grid */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.about-stat {
  padding: var(--spacing-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.service-category {
  padding: var(--spacing-lg);
  border: 1px solid var(--border-color);
  background: linear-gradient(180deg, var(--bg-card) 0%, transparent 100%);
  transition: border-color 0.2s;
}

.service-category:hover {
  border-color: #444;
}

.service-category h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.service-category ul li {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.service-category ul li strong {
  color: var(--text-primary);
  font-weight: 500;
}

/* Cards Grid (Architectures & Products) */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}



.case-study,
.product-card {
  padding: var(--spacing-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: transform 0.2s, background-color 0.2s;
  display: flex;
  flex-direction: column;
}

.case-study:hover,
.product-card:hover {
  background-color: var(--bg-card-hover);
  transform: translateY(-2px);
}

.tag,
.status-badge {
  display: inline-block;
  font-family: var(--mono-font);
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  margin-bottom: var(--spacing-md);
  align-self: flex-start;
}

.case-study h3,
.product-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.problem {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
}

.tech-details {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-md);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.tech-details p {
  margin-bottom: 4px;
}

/* Tech Stack */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-lg);
}

.stack-item {
  border-left: 2px solid var(--border-color);
  padding-left: var(--spacing-md);
}

.stack-item h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.stack-item p {
  font-size: 1rem;
  color: var(--text-primary);
  font-weight: 500;
}



/* Footer */
.site-footer {
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--border-color);
  margin-top: var(--spacing-2xl);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-logo {
  display: flex;
  align-items: center;
}

.footer-logo img {
  height: 32px;
  width: auto;
  opacity: 0.8;
}

.footer-rights {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .site-nav {
    display: none;
    /* Simplify for now, could add hamburger */
  }
}